Storing data in Excel and Sending Email

I'm trying to create a simple app which collects data in a single excel file in Onedrive (adding row) and sending an email. For that, I am trying to a get button to submit the data to the source and to send an email notifying the recipient that a new alert has been created with the details in the email.

I need help with few things

Connecting the app to the excel file in the one drive.

I want to use an option where we can upload multiple pictures if possible store it (excel) and also send it in the email.